Contact plate including at least one bonding connector configured to establish electrical bonds to terminals of at least one group of battery cells in a battery module
Embodiments are directed to contact plates configured to establish electrical bonds between battery cells in a battery module. In a first embodiment, the contact plate includes at least one primary conductive layer including a hole that is aligned with two or more terminals of two or more battery cells in a group of battery cells that are configured to be connected in parallel with each other, and a bonding connector configured to provide direct electrical bonds between the contact plate and the two or more terminals of the two or more battery cells. In a second embodiment, a contact plate includes at least one primary conductive layer and a set of bonding connectors made from at least one material that is selected to match at least one material used for the terminals of the at least one group of battery cells.
1. A contact plate configured to establish electrical bonds between battery cells in a battery module, comprising:
a set of bonding connectors that are configured to provide direct electrical bonds between the contact plate and terminals of a group of battery cells which connect the group of battery cells in parallel with each other;
at least one primary conductive layer with a hole, wherein the hole is aligned with two or more terminals of two or more battery cells in the group of battery cells, and
wherein a bonding connector among the set of bonding connectors is configured to provide direct electrical bonds between the contact plate and each of the two or more terminals of the two or more battery cells.
2. The contact plate of claim 1 , wherein the two or more terminals correspond to two or more negative terminals of the two or more battery cells.
3. The contact plate of claim 2 ,
wherein the two or more battery cells are adjacent to each other,
wherein the two or more negative terminals correspond to two or more negative cell rims of the two or more battery cells, and
wherein the bonding connector is configured to be pressed down and welded onto a region that includes portions from each of the two or more negative cell rims to form the direct electrical bonds.
4. The contact plate of claim 1 , wherein the two or more terminals include two terminals of two battery cells.
5. The contact plate of claim 1 , wherein the contact plate is configured as a multi-layer contact plate that includes:
the at least one primary conductive layer,
a cell terminal connection layer that is joined with the at least one primary conductive layer,
wherein a portion of the cell terminal connection layer is configured to form a set of bonding connectors that includes at least the bonding connector.
6. The contact plate of claim 5 ,
wherein the at least one primary conductive layer includes a single primary conductive layer that is joined with the cell terminal connection layer, or
wherein the at least one primary conductive layer includes two primary conductive layers that are joined with the cell terminal connection layer.
7. The contact plate of claim 1 , wherein the contact plate is configured as a single-layer contact plate.
8. The contact plate of claim 1 ,
wherein the hole is configured as a contact area where the bonding connector is configured to connect to the two or more terminals, and
wherein the bonding connector is connected to the contact plate inside the hole.
9. The contact plate of claim 8 , wherein the bonding connector is connected to the contact plate on an interior sidewall of the hole.
10. The contact plate of claim 1 ,
wherein the hole is configured as a contact area where the bonding connector is configured to connect to the two or more terminals, and
wherein the bonding connector is welded onto a top of the contact plate outside of the hole.
11. The contact plate of claim 10 , wherein the at least one primary conductive layer includes a groove on the top of the contact plate into which the bonding connector is inserted.